diff --git a/beamercolorthemeaptero.sty b/beamercolorthemeaptero.sty
index 45e3535..60119b2 100644
--- a/beamercolorthemeaptero.sty
+++ b/beamercolorthemeaptero.sty
@@ -73,8 +73,9 @@
 \setbeamercolor{theorem line bottom}{fg=orange}
 
 \setbeamercolor{message}{fg=white, bg=red}
-\setbeamercolor{message line top}{fg=black}
-\setbeamercolor{message line bottom}{fg=black}
+\setbeamercolor{message line top}{fg=}
+\setbeamercolor{message line bottom}{fg=}
+\setbeamercolor{message symbol}{fg=}
 
 \setbeamercolor{section in toc}{parent={normal text}}
 \setbeamercolor{subsection in toc}{parent={normal text}}
diff --git a/beamercolorthemeut.sty b/beamercolorthemeut.sty
index 4bc5cb1..38866a3 100644
--- a/beamercolorthemeut.sty
+++ b/beamercolorthemeut.sty
@@ -50,7 +50,7 @@
 \setbeamercolor{frametitle line}{fg=utgold}
 
 \setbeamercolor{block title}{fg=white, bg=utlightblue}
-\setbeamercolor{block body}{fg=normal text.fg, bg=utlightblue!15}
+\setbeamercolor{block body}{fg=normal text.fg, bg=utlightblue!20}
 \setbeamercolor{block line top}{fg=}
 \setbeamercolor{block line middle}{fg=utlightblue}
 \setbeamercolor{block line bottom}{fg=utlightblue}
diff --git a/beamerthemelines.sty b/beamerthemelines.sty
index 11a803d..c811e0f 100644
--- a/beamerthemelines.sty
+++ b/beamerthemelines.sty
@@ -81,7 +81,7 @@
     \c@tmp@numslides=\numexpr\beamer@endpageofframe-\beamer@startpageofframe\relax%
     \makebox[2.5ex][r]{\ifnum\c@tmp@numslides>0 -- \insertslidenumber{}\fi}}}
 
-\setbeamertemplate{page number in head/foot}[frames]
+\setbeamertemplate{page number in head/foot}[slides]
 
 
 %%%%% footline %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -345,7 +345,7 @@
   \IfStrEq{\insertblocktitle}{}{}{%    % IfStrEq does not work for theorems!
     \ifbeamercolorempty[fg]{block line#1 top}{}{%
       \nointerlineskip
-      \begin{beamercolorbox}[wd=\columnwidth,hd=#2]{block line#1 top}
+      \begin{beamercolorbox}[wd=\columnwidth,ht=#2]{block line#1 top}
         \rule{\columnwidth}{#2}
       \end{beamercolorbox}
       \nointerlineskip%
@@ -355,7 +355,7 @@
     \end{beamercolorbox}}
   \nointerlineskip
   \ifbeamercolorempty[fg]{block line#1 middle}{}{%
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#3]{block line#1 middle}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#3]{block line#1 middle}
       \rule{\columnwidth}{#3}
     \end{beamercolorbox}
     \nointerlineskip}%
@@ -368,7 +368,7 @@
   \end{beamercolorbox}%
   \ifbeamercolorempty[fg]{block line#1 bottom}{}{%
     \nointerlineskip
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#2]{block line#1 bottom}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#2]{block line#1 bottom}
       \rule{\columnwidth}{#2}
     \end{beamercolorbox}
   }%
@@ -408,7 +408,7 @@
   \usebeamerfont{#1 title}%
   \ifbeamercolorempty[fg]{#1 line top}{}{%
     \nointerlineskip
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#2]{#1 line top}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#2]{#1 line top}
       \rule{\columnwidth}{#2}
     \end{beamercolorbox}
     \nointerlineskip%
@@ -418,7 +418,7 @@
   \end{beamercolorbox}
   \nointerlineskip
   \ifbeamercolorempty[fg]{#1 line middle}{}{%
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#3]{#1 line middle}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#3]{#1 line middle}
       \rule{\columnwidth}{#3}
     \end{beamercolorbox}
     \nointerlineskip}%
@@ -431,7 +431,7 @@
   \end{beamercolorbox}%
   \ifbeamercolorempty[fg]{#1 line bottom}{}{%
     \nointerlineskip
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#2]{#1 line bottom}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#2]{#1 line bottom}
       \rule{\columnwidth}{#2}
     \end{beamercolorbox}
   }%
@@ -478,7 +478,7 @@
   \usebeamerfont{message}%
   \ifbeamercolorempty[fg]{message line top}{}{%
     \nointerlineskip
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#1]{message line top}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#1]{message line top}
       \rule{\columnwidth}{#1}
     \end{beamercolorbox}
     \nointerlineskip}%
@@ -488,13 +488,13 @@
   \end{beamercolorbox}
   \ifbeamercolorempty[fg]{message line bottom}{}{%
     \nointerlineskip%
-    \begin{beamercolorbox}[wd=\columnwidth,hd=#2]{message line bottom}
+    \begin{beamercolorbox}[wd=\columnwidth,ht=#2]{message line bottom}
       \rule{\columnwidth}{#2}
     \end{beamercolorbox}}%
   \medskip
 }
 
-\setbeamertemplate{message}[lines]{0.5pt}{0.5pt}
+\setbeamertemplate{message}[lines]{1pt}{1pt}
 
 \newcommand<>{\messagebox}[1]{%
   \only#2{\def\insertmessage{#1}%
diff --git a/lines-example.tex b/lines-example.tex
index c1a3ae7..50b5fa3 100644
--- a/lines-example.tex
+++ b/lines-example.tex
@@ -9,6 +9,8 @@
 \date[2021]{March 2021}
 
 \setbeamerfont{block body}{size=\small}
+\setbeamercolor{message line top}{fg=orange}
+\setbeamercolor{message line bottom}{fg=}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -83,7 +85,7 @@
 \end{frame}
 
 \begin{frame}[fragile]{Frame subtitle}
-  \framesubtitle{I can not focus and add a subtitle}
+  \framesubtitle{Here we have a subtitle}
   \begin{block}{Frame environment with subtitle}
     \verb!\begin{frame}!\\
     \verb!  \frametitle{The title of my slide}!\\
@@ -276,7 +278,7 @@
     \texttt{theorem} environment.
   \end{theorem}
   \begin{definition}
-    Definition block with content: \texttt{definition} environment.\\[1ex]
+    \texttt{definition} environment.\\[1ex]
     All theorem environments get the same color and font:
     \begin{itemize}
     \item \texttt{theorem title}
@@ -285,10 +287,10 @@
     \end{itemize}
   \end{definition}
   %\begin{example}
-  %  Example block with content: \texttt{example} environment.
+  %  \texttt{example} environment.
   %\end{example}
   \begin{proof}
-    Proof block with content: \texttt{proof} environment.\\
+    \texttt{proof} environment.\\
     Same colors and fonts as the \texttt{block} environment.
   \end{proof}
 \end{frame}
@@ -297,10 +299,19 @@
   \begin{block}{A new (non-beamer) command for highlighting messages}
     \verb!\messagebox{Take home message}!
   \end{block}
-  \vspace{5ex}
+  \vfill
   \messagebox{Take home message}
-  \vspace{5ex}
+  \vfill
   Use it!
+  \vfill
+  \begin{block}{Colors/Fonts/Template}
+    \verb!\setbeamertemplate{message}[lines]{1pt}{1pt} % width top/bottom line!\\
+    \verb!\setbeamercolor{message}{fg=white, bg=red}!\\
+    \verb!\setbeamercolor{message line top}{fg=orange}!\\
+    \verb!\setbeamercolor{message line bottom}{fg=}!\\
+    \verb!\setbeamertemplate{message symbol}[circle]   % default, circle, arrow!\\
+    \verb!\setbeamercolor{message symbol}{fg=white}!
+  \end{block}
 \end{frame}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
@@ -522,12 +533,14 @@
 \frame[plain]{\subsectionpage}
 
 \begin{frame}[fragile]{Section page}
-  Section commands between the frames, like\\
-  \verb!\section{A new section}!\\
+  Section commands between the frames, like
+  \begin{block}{}
+    \verb!\section{A new section}!
+  \end{block}
   automaticallly create a special frame with section number and title.
 
   \begin{block}{No automatic section pages}
-    \verb!\AtBeginSection{}!
+    \verb!\AtBeginSection{}  % in preamble!
   \end{block}
   \begin{block}{Manual insertion of a section page}
     \verb!\frame[plain]{\sectionpage}!
@@ -545,12 +558,15 @@
 
 \begin{frame}[fragile]{Subsection pages}
   After a subsection command\\
-  \verb!\subsection{A new subsection}!\\
+  \begin{block}{}
+    \verb!\subsection{A new subsection}!
+  \end{block}
   you may want to insert a subsection page displaying the current
   section and subsection numbers and titles:
   \begin{block}{Subsection page}
     \verb!\frame[plain]{\subsectionpage}!
   \end{block}
+  \vfill
   \begin{block}{Colors/Fonts}
     \verb!\setbeamercolor{subsection name}{parent={titlelike}}!
     \verb!\setbeamercolor{subsection name separator}{parent={section name}}!
@@ -562,31 +578,34 @@
 \section{Further reading}
 
 \begin{frame}{Beamer user guide}
-  Read the beamer user guide at\\
-  \url{http://ftp.rrzn.uni-hannover.de/pub/mirror/tex-archive/macros/latex/contrib/beamer/doc/beameruserguide.pdf}\\
-
-  \vspace{2ex}
+  Read the beamer user guide at
+  \begin{block}{}
+    \url{http://ftp.rrzn.uni-hannover.de/pub/mirror/tex-archive/macros/latex/contrib/beamer/doc/beameruserguide.pdf}
+  \end{block}
+  
+  \vfill
   In particular
   \begin{itemize}
   \item the tutorial (section 3)
-  \item quite nice and independent of beamer are the ``guidelines for creating presentations'' (section 5)
+  \item the ``guidelines for creating presentations'' (section 5) --- quite nice and independent of beamer!
   \item ``creating overlays'' (section 9)
-  \item you find some fancy features in section 11 (hyperlinks and zooming)
+  \item section 11 for some fancy features (hyperlinks and zooming)
   \item ``local structure'' (section 12) for more infos on lists and blocks, etc.
   \end{itemize}
 \end{frame}
 
 \begin{frame}{Beamer templates}
-  Templates are a powerful method of beamer that allow you to modify
-  the appearance of your presentation.
-
-  \bigskip
+  \begin{alertblock}{}
+    Templates are a powerful method of beamer that allow you to modify
+    the appearance of your presentation.
+  \end{alertblock}
+  \vfill
   Read in the beamer user guide
   \begin{itemize}
   \item section 16.3 ``Changing the Templates Used for Different Elements of a Presentation''
   \end{itemize}
 
-  \bigskip
+  \vfill
   You find a nice summary of common beamer template/color/font names in the
   \begin{block}{Beamer appearance cheat sheet}
     \url{http://www.cpt.univ-mrs.fr/~masson/latex/Beamer-appearance-cheat-sheet.pdf}
diff --git a/ut-example.tex b/ut-example.tex
index e2afaca..516f6d0 100644
--- a/ut-example.tex
+++ b/ut-example.tex
@@ -208,9 +208,9 @@
   \begin{block}{A new (non-beamer) command for highlighting messages}
     \verb!\messagebox{Take home message}!
   \end{block}
-  \vspace{5ex}
+  \vfill
   \messagebox{Take home message}
-  \vspace{5ex}
+  \vfill
   Use it!
 \end{frame}
 
@@ -301,21 +301,19 @@
 \frame[plain]{\subsectionpage}
 
 \begin{frame}[fragile]{Section page}
-  Section commands between the frames, like\\
-  \verb!\section{A new section}!\\
+  Section commands between the frames, like
+  \begin{block}{}
+    \verb!\section{A new section}!
+  \end{block}
   automaticallly create a special frame with section number and title.
-
+  \vfill
   \begin{block}{No automatic section pages}
-    \verb!\AtBeginSection{}!
+    \verb!\AtBeginSection{}  % in preamble!
   \end{block}
+  \vfill
   \begin{block}{Manual insertion of a section page}
     \verb!\frame[plain]{\sectionpage}!
   \end{block}
-  \begin{block}{Colors/Fonts}
-    \verb!\setbeamercolor{section name}{parent={titlelike}}!
-    \verb!\setbeamercolor{section name separator}{parent={section name}}!
-    \verb!\setbeamercolor{section title}{parent={titlelike}}!
-  \end{block}
 \end{frame}
 
 \subsection{Subsection page}
@@ -323,34 +321,33 @@
 \frame[plain]{\subsectionpage}
 
 \begin{frame}[fragile]{Subsection pages}
-  After a subsection command\\
-  \verb!\subsection{A new subsection}!\\
+  After a subsection command
+  \begin{block}{}
+    \verb!\subsection{A new subsection}!
+  \end{block}
   you may want to insert a subsection page displaying the current
   section and subsection numbers and titles:
+  \vfill
   \begin{block}{Subsection page}
     \verb!\frame[plain]{\subsectionpage}!
   \end{block}
-  \begin{block}{Colors/Fonts}
-    \verb!\setbeamercolor{subsection name}{parent={titlelike}}!
-    \verb!\setbeamercolor{subsection name separator}{parent={section name}}!
-    \verb!\setbeamercolor{subsection title}{parent={titlelike}}!
-  \end{block}
 \end{frame}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 \section{Further reading}
 
 \begin{frame}{Beamer user guide}
-  Read the beamer user guide at\\
-  \url{http://ftp.rrzn.uni-hannover.de/pub/mirror/tex-archive/macros/latex/contrib/beamer/doc/beameruserguide.pdf}\\
-
-  \vspace{2ex}
+  Read the beamer user guide at
+  \begin{block}{}
+    \url{http://ftp.rrzn.uni-hannover.de/pub/mirror/tex-archive/macros/latex/contrib/beamer/doc/beameruserguide.pdf}
+  \end{block}
+  \vfill
   In particular
   \begin{itemize}
   \item the tutorial (section 3)
-  \item quite nice and independent of beamer are the ``guidelines for creating presentations'' (section 5)
+  \item the ``guidelines for creating presentations'' (section 5) --- quite nice and independent of beamer!
   \item ``creating overlays'' (section 9)
-  \item you find some fancy features in section 11 (hyperlinks and zooming)
+  \item section 11 for some fancy features (hyperlinks and zooming)
   \item ``local structure'' (section 12) for more infos on lists and blocks, etc.
   \end{itemize}
 \end{frame}